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The first mark sense scanner was the IBM 805 Test Scoring Machine; this read marks by sensing the electrical conductivity of graphite pencil lead using pairs of wire brushes that scanned the page. In the 1930s, Richard Warren at IBM experimented with optical mark sense systems for test scoring, as documented in US Patents 2,150,256 (filed in ...
Scantron Corporation. A Scantron 888P machine, used for testing in schools. Scantron Corporation is an American company based in Eagan, Minnesota. Scantron provides assessment solutions and technology services for business, education, certification, and government clients. Scantron Assessment Solutions deals with scanner manufacturing, forms ...
IBM 1287 Optical Reader. The IBM 1287 is an online reader that can optically scan printed paper tapes and cut form documents to generate input data for an IBM System/360 or System/370 host. It can read machine printed data as well as handprinted numbers and optical marks (based on installed model and features).
A transesophageal echocardiogram ( TEE; also spelled transoesophageal echocardiogram; TOE in British English) is an alternative way to perform an echocardiogram. A specialized probe containing an ultrasound transducer at its tip is passed into the patient's esophagus. [ 1] This allows image and Doppler evaluation which can be recorded.
Contrast-enhanced ultrasound ( CEUS) is the application of ultrasound contrast medium to traditional medical sonography. Ultrasound contrast agents rely on the different ways in which sound waves are reflected from interfaces between substances. This may be the surface of a small air bubble or a more complex structure.
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A video showing an inkjet printer while printing a page. In computing, a printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper. [1] While most output is human-readable, bar code printers are an example of an expanded use for printers. [2]
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